Angelina Jolie has arrived," an airport official in Phnom Penh told AFP on Wednesday.

Officials at her charity declined to comment on her trip, and it was unclear if her celebrity husband Brad Pitt or any of their children were travelling with her.

The two had been in Mumbai filming "A Mighty Heart", a movie about US journalist Daniel Pearl's abduction and murder by Islamic militants in Pakistan in 2002. Jolie is starring in the movie and Pitt is a producer.

Last week they became embroiled in controversy after three of their bodyguards were arrested following a scuffle at an Islamic school in Mumbai.

Parents at the school had accused the bodyguards of shouting, "You bloody Indians, you bloody Muslims," when they came to collect their children after classes.

Pitt apologised Friday to Mumbai police over the incident.

The three bodyguards have been released on bail each of 25,000 rupees (555 dollars) after being held on accusations of making threats and an "insult to religion."

Jolie came to know Cambodia while shooting "Lara Croft: Tomb Raider" at the famed Angkor Wat temple in 2001, and owns a home in the Samlot district of northwestern Battambang province.

She has campaigned for environmental reform in the impoverished country, which has rewarded her work with citizenship and last year gave her a Cambodian passport.

Jolie sponsors the Maddox Jolie-Pitt Project, named after her Cambodian-born son. She plans to give the charity 1.5 million dollars to build schools and health care centers, provide training for health workers, and construct public toilets and roads.